Mechanical movement for gas-engine valves, &amp;c.



No. 634,207. Patented Oct. 3, I899.

' J. B. FENNER.

MECHANICAL MOVEMENT FUR GAS ENGINE VALVES, 810.

(Application med June 17, 1898.) (No Model.) 3 Sheets8hoet l.

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No. 634,207. Patented Oct. 2,, 1899.

1. B. FENNER.

MECHANICAL MOVEMENT FUR GAS ENGINE VALVES. 8w.

(Application filed. June 17, 1898.)

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(No Model.)

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gm mm M m MQW m v No. 634,207. Patented Oct. 3, I899.

J. B. FENNER.

MECHANICAL MOVEMENT FOB GAS ENGINE VALVES, 8w.

(Application filed Time 17, 1898.)

3 Sheets-Sheet 3,

(No Model.)

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7Q W Jnve UNITED STATES PATENT @EErcE.

JESS B. FENNER, OF BUFFALO, NEW YORK.

MECHANICAL MOVEMENT FOR GAS-ENGINE VALVES, 8L0.

SPECIFICATION forming part of Letters Patent No. 634,207, dated October 3, 1899.

, Application filed June 17, 1898.

T to whom it may concern:

Be it known that I, JESS B. FENNER, a citi zen of the United States, residing at Buifalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Mechanical Movements for Operating Gas- Engine Valves, &c., of which the followingis a specification.

This invention relates to a mechanical movement whereby rotary motion is converted into reciprocating motion.

The object of my invention is to produce a mechanical movement of this character which is compact, noiseless, and dust proof and which permits of varying the number of ro-. tations with relation to each reciprocation.

In the accompanying drawings, consisting of three sheets, Figure 1 is a sectional side elevation showing my mechanical movement applied to a gas-engine for operating the exhaust-valve. Fig. 2 is avertical longitudinal section, on an enlarged scale, of one form of my mechanical movement, taken in line 2 2,

Fig. 3. Fig. 3 is a horizontal section in line 3 3, Fig. 2. Fig. at is a vertical transverse section in lined 4, Fig. 2. Fig. 5 is a vertical longitudinal section in line 5 5, Fig. 3. Fig. 6 is a side elevation of a modified form of my improved mechanical movement. Fig. 7 is a vertical longitudinalsection thereof. Fig. Sis a horizontal section in line 8 8, Fig. 7. Fig. 9 is a vertical transverse section in line 9 9, Fig. 7. v

Like letters of reference refer to like parts in the several figures.

In Figs. 1 to 5 my improved mechanical movement is organized for operating the exhaust-valve of a gas-engine in which the piston reciprocates four times during each cycle of operations and the exhaust-valve is opened during every alternate backward stroke of the piston. During the first forward stroke of the piston the latter draws a charge of fuel into the cylinder, which charge is compressed by the subsequent backward stroke of the piston. During the next forward movement of the piston the charge of fuel is exploded, which propels the piston with a' working stroke, and during the following backward stroke the exhaust-valve is opened to permit the products of combustion to escape from Serial No. 683,687. (No model.)

the cylinder preparatory to drawing a fresh charge of fuel into the cylinder.

. The gas-engine shown in the drawings consists, essentially, of a cylinder A, mounted upon a base a, a crank-shaft B, journaled in hearings on the base and having its crank connected by a pitman b with the piston in the cylinder, a valve-chest O, communicating with the cylinder and provided with a fuelinlet D and an exhaust E, a fuel-valve d, controlling the fuel-inlet, and an exhaustvalve e, controlling the exhaust.

' F F represent two eccentric disks arranged axially in line and turning on the shaft B or on a sleevef, which is keyed to the shaft. G G represent two parts of an eccentric-strap, which fits around the eccentric surface ofboth disks, the two sections being connected by bolts g and one of the sections being connected by a rod g with the exhaust-valve.

I-I represents a gear-wheel arranged between the eccentric disks and formed on or secured to the sleeve f, so as to turn with the shaft B.

I represents an internal gear-rim arranged between the eccentric disks on one side of the gear-wheel H and secured to the inner side of one or both sections of the eccentricstrap by pins 71 or otherwise.

J K represent a small gear-pinion and a large gear-pinion, respectively, which are arranged axially in line and which are rigidly connected or formed in one piece. These pinions are journaled upon a transverse bolt or stud L, which connects the eccentric disks, so that the pinions are carried by said disks. The small gear-pinion meshes with the gearwheel H on the shaft and the large gear-pinion meshes with the internal gear-rim on the eccentric-strap. Upon turning the shaft in the direction of the arrow 1, Fig 2, the gear wheel mounted thereon turns the small gearpinion J and the large gear-pinion connected therewith in the direction of the arrow 2. This turning movement of the pinions about their own axes is retarded by the engagement oft-he large pinion with the gear-rim, which causes the large gear-pinion to roll on the gear-rim I, and thereby carry both pinions bodily in the direction of the arrow 3 about the axis of the shaft. This bodily movement of the pinions around the gear-rim causes the eccentric disks which carry the pinions to also be turned in the direction of the arrow 3 about the shaft, whereby the eccentric-strap is shifted transverselyto the axis of the shaft for opening and closing the exhaust-valve connected therewith. The relative size of the gear wheel, rim, and pinions is such that two revolutions of the crank-shaft produce a forward-aud-backward movement, so that the exhaust-valve operated thereby is opened during every alternate rotation of the crankshaft.

The inner sides of the eccentric disks bear against each other and are recessed to accommodate the gear wheel, rim, and pinions. Each of the eccentric disks is provided with a marginal flange m, which bears against the adjacent side of the strap and confines the latter on the eccentric disk. The eccentric disks are preferably held in axial alinement by a pin a engaging with recesses in the opposing sides of the eccentric disks, as shown in Fig. 2h. The gear-rim is preferably secured to the eccentric-strap section G, and the inner side of the other strap-section G is provided with a groove 0, which receives the adjacent portion of the gear-rim, and this groove is made sufficiently deep to permit of drawing the straps together for taking up the wear on the eccentrics. The straps may be drawn closer together for this purpose by tightening the connecting-bolts after the opposing surfaces of the strap-sections have been filed off the desired extent.

The relative speed of the rotating member and the reciprocating member may be varied by varying the sizes of the gear-wheel and pinions.

In the modified construction of the mechanical movement shown in Figs. 0 to 9 only one gear-pinion P is employed, which meshes on one side with the gear-wheel H, secured to the shaft, and meshes on its other side with the internal gear-rim I, secured to the eccentric-strap. The gear-pinion P is provided on opposite sides with trnnnions, which are journaled in bearings in the eccentrics F F and whereby the latter are compelled to turn with the pinion about the axis of the shaft. In the arrangement of gearing shown in Figs. 6 to 9 a back-and-forth movement of the reciprocating part is produced during every three turns of the rotating part.

Although I have shown my mechanical movement in connection with a gas-engine for operating the exhaust-valve thereof, I do not wish to be understood as limiting its use to that purpose, because it can be used in various kinds of machines in which it is desired to convert a certain number of rotations into a lesser number of reciprocations.

I claim as my invention 1. The combination with a rotary shaft, of an eccentric rotating concentrically with reference to the shaft but independent thereof, an eccentric-strap embracing the eccentric, and intermediate gearing mounted on said eccentric and meshing with gearing on the shaft and with gearing on the eccentric-strap, substantially as set forth.

2. The combination with a rotary shaft, of an eccentric rotating concentrically with reference to the shaft but independent thereof, an eccentric-strap embracing said eccentric, a gear-wheel secured to said shaft, an internal gear-rim secured to the eccentric-strap, and an intermediate gear-wheel journaled on the eccentric and meshing with the gear-wheel on the shaft and the gear-rim on the eccentric-strap, substantially as set forth.

3. The combination with a rotary shaft, of an eccentric rotating concentrically with reference to the shaft but independent thereof, an eccentric-strap embracing said eccentric, a gear-wheel secured to said shaft, an internal gear-rim secured to the eccentric-strap, and a pair of connected gear-wheels journaled on the eccentric, one of said pair meshing with the gear-wheel on the shaft and the other of said pair meshing with the internal gear rim, substantially as set forth.

4. The combination with a rotary shaft, of two eccentric disks arranged side by side and rotating concentrically with reference to the shaft but independent thereof, an eccentricstrap embracing said disks, a gcar-wheel arranged between said disks and secured to said shaft, an internal gear-rim arranged between said disks and secured to said strap, and a pair of connected gear-wheels arranged between said disks and journaled thereon, one of said pair meshing with the gear-wheel of the shaft while the other of said pair meshes with the gear-rim of the eccentric-strap, substantially as set forth.

\Vitness my hand this 25th day of March, 1808.

JESS l FENNER.

\Vitnesscs:

Tnno. L. Porr, CARL F. GEYEn.

ICC. 

